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Old Jan 12, 2013, 09:11 AM
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9118 lower blade shaft fixing

I imagine this mod has been done many times before but just in case it hasn't....

Instead of turning the lower blade mount upside down to lower them I though of a killing two birds with one stone...

I've done away with the useless screws that hold the mount to the hollow shaft and by the plastic's thinnest section.
I drilled two small .9mm holes either side of the mount immediately between the buckle peg and the blade shoulder, I then put a tap through it followed by a grub screw whose bullet end fits the tube hole perfectly. So the grub screw is the diameter of the locating hole in the hollow shaft plus of course its thread.
I should add the grub screw is a good bit bigger than the drilled hole in the mount but that was by design so it fitted really tight.
Placing the mount back on the shaft I pushed it on further than usual until the new screws lined up, and because they are both fatter and more supported by the thicker plastic section I was able to get them down really tight.
So now I have the blades lowered and held really tight to the shaft.

Oh and one last thing, I was able to refit the decorative parts along with the two buckles.

Hope this is of help to someone.
Mike.
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Old Jan 12, 2013, 02:06 PM
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United States, WA, Port Orchard
Joined Apr 2007
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jazzman22,

I did the same thing to both of my DH9118's. I couldn't get the screws tight enough in the thin plastic of the blade holder, to keep it from turning on the shaft.

I made a simple drill jig and drilled new holes in the shaft, Using my drill press. It works like a charm. No more slippage and sure saves a lot of frustration.

J
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Old Jan 14, 2013, 02:46 AM
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Hi Jim,
With your 9118 can you fly it indoors and get it to hover fairly steadily ?
I'm wondering if the swirling down draft is the reason I cannot get mine to hover indoors.

Mike.
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Old Jan 14, 2013, 12:41 PM
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United States, WA, Port Orchard
Joined Apr 2007
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jazzman22,

I have my DH9118's balanced so that they will move forward when the sticks are neutral. I only fly them outdoors, I have them modified so they will fly in a light wind (5 to 6 mph).

J
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Old Jan 15, 2013, 12:26 PM
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Hi Jim,
I've come to realise they are exclusively for outdoor use and also realise I've been pretty silly trying to do otherwise.
I did have a quick go with it outside this morning in the snow brrrr, and was very pleased with how steady it is now. I can also now understand why you have them set to fly forward on a neutral stick as the slightest drift of air has me struggling to make her fly forward; even with the mod sky king tail blade fitted it's a tad slow to say the least.

I've now indulged myself by ordering a V911 for flying in the house!!

All the best,
Mike.
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Old Jan 15, 2013, 01:25 PM
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United States, WA, Port Orchard
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9118 lower blade shaft fixing

Hi Mike,

I have one of the V911 beasties. and you will need a fair amount of space to fly it in until you get it trimmed. I had to wait until it was calm outside to get in a trim flight.

It is much faster the the 3ch coaxial Heli's. But its a lot more fun to fly. I know after I fly my V911 and other 4ch heli's, I almost break the left stick trying to fly the 3ch heli's.

In fact, if you intend to get involved in the larger 4 to 6 ch heli's, you should never fly another 3ch. I only mess with them, because they need to be modified to fly outdoors, so it gives me something to do in the winter when I can't fly my planes.

J
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Old Jan 16, 2013, 09:58 AM
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Hi Jim,
Thanks for the heads up on the 911. I couldn't make my mind up where to go after the 9118 which is now flying beautifully :-) Anyway after thinking a bit more I realised I really couldn't be getting another coaxial, particularly given I've been repairing my two grandson's heli's for them, which without sounding arrogant, I think I've pretty well got the idea with them.
So after a good bit of searching both net and soul I went down the road where millions have gone before... V911 ! It's due to arrive in 5 or 6 days ;-D

When I first got the 9118 I held onto the skids so I could feel which way it was pulling and did a bit of trimming this way...would this be practical with the 911? though I think I can hear you now say NO! Heehee.

We've still got heaps of snow and it's sooo cold...roll on summer!

Regards,
Mike.
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Old Jan 16, 2013, 02:48 PM
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United States, WA, Port Orchard
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9118 lower blade shaft fixing

Hi Mike,

I never tried that way of determining which way to trim the Heli. I think that it would work. I just put it on a smooth surface and then gave it throttle until the tail started to move and then trimmed it until it stopped.

When I tried that with the V911, that little beastie was in the air and flying away. Evidently, My reflexes aren't fast enough. (I'm one of the Old dudes)

I do know that when you get the V911 setup to your liking, You will have a ball flying it. It's stable to a point, but can be made to do some fun flying. It's also pretty tough. I've flown it into just about everything in the house and so far without any damage. (I do have spare parts for it tho, just in case)

It will be interesting to hear what you think of that little beastie, After you've flown it for awhile.

J
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Old Jan 17, 2013, 02:09 AM
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Hi Jim,
now I really am chaffing at the bit for the 911 to arrive here :-)

Between times I've been searching around, without much luck, for more info about balance bars etc I'm trying find details about how much slack the bar's pivot should have and also the effects of lose buckles.
On my 9118 you can lift the bar up and down at the pivot point whilst holding the bar ridged, it is only small amount but that coupled with slack in the buckle joints it has the effect that while holding the upper blades ridged the balance bar can move though maybe 3/8" to 1/2" from one end to the other.

Appreciate your thoughts on this.


Minus 10 Celsius last night! ! :-(

I'm an old dude myself Jim, I get my state pension this April.

Mike.
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Old Jan 17, 2013, 02:34 PM
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9118 lower blade shaft fixing

Hi Mike,

Are you using the stock balance bar on your DH9118? The balance bar should be able to move freely up and down, but without a lot of play in the pivot point and the mast head.

I'm using the balance bar off of a DH9077 on both of my DH9118's. I have maybe a 1/32" of play between the mast head and the balance bar and almost no play between the buckle joints. It moves freely up and down, but there's virtually no slop in the linkage.

The biggest advantage to using the balance bar off of the DH9077 is that it completely eliminates blade strikes. It's shorter, lighter, and made of plastic. The only downside, if it can be called that, is that it's about $12 for one and that's because it has a battery powered led in one end of the light bar, Only one of mine worked and in the evening it's kind of cool to see a red glow coming from the light bar. Since it prevents blade strikes, I guess you could say that it's priceless

J
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Old Jan 19, 2013, 12:20 PM
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Hi Jim,
Yep I did the same mod by fitting the bar from a 9077, oddly they only cost about $5 over here, but then there's a shed load of other bits and pieces that are far cheaper in the US.

It's interesting about the amount of play you speak of; the pin I can bush to get rid of slop but how should I tighten the buckles...maybe thin washers on the back of the ball arm throwing the buckle forward nearer one side of the ball ? Any ideas?

I was quite amazed to find how well balanced the 9077 bar is given the battery and led, all I had to do to make it dead on was to add one turn of a piece of cellotape that brought it to equilibrium.

Still waiting on the 911... I'm hoping it arrives this week sometime.

Mike.
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Old Jan 19, 2013, 12:58 PM
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9118 lower blade shaft fixing

Quote:
Originally Posted by jazzman22 View Post
Hi Jim,
Yep I did the same mod by fitting the bar from a 9077, oddly they only cost about $5 over here, but then there's a shed load of other bits and pieces that are far cheaper in the US.

It's interesting about the amount of play you speak of; the pin I can bush to get rid of slop but how should I tighten the buckles...maybe thin washers on the back of the ball arm throwing the buckle forward nearer one side of the ball ? Any ideas?

I was quite amazed to find how well balanced the 9077 bar is given the battery and led, all I had to do to make it dead on was to add one turn of a piece of cellotape that brought it to equilibrium.

Still waiting on the 911... I'm hoping it arrives this week sometime.

Mike.
Hi Mike,

Is there excessive play between the ball and buckle? I don't have any play there as it's a snap fit.

You speak of using thin washers to tighten the buckles. Do you have more than one buckle on the balance bar? Mine only came with one buckle on the balance bar.

I checked all of the rest of my 3ch Heli's and they all only have one buckle on the balance bar. Some of the 4ch heli's have two buckles on the balance bar, the 4ch V911 has 2, But I have a 4ch coaxial heli that has only one. There's no excessive amount of play in any of them.

I'm wondering if the buckle(s) that's on your DH9118 balance bar is/are the right one(s)? Color me confused

I'll hope with you about the V911 arriving soon. You should really enjoy flying that little beastie.

I don't want you to start salivating, But I got some more stick time on the V911 yesterday, The wind was calm and there was quite a bit of ground fog, But I kept it close to me and had a ball.

J
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Old Jan 23, 2013, 10:07 AM
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Hi Jim,
Now that's interesting as I have two buckles on mine...would that make it better or worse?
I was told when I bought the mod bar that I should have the extra buckle...perhaps a sales pitch,who know's.
Both buckles are sloppy even the original one, I should add that it's not by much but enough to make me wonder why folks talk about sanding and cleaning any edges or snags etc. Now I realise mine is exception...there's always one and I always get it!! :-)
In our family we always say that if there were two dozen identical objects on the shop shelf we'd get the busted one, once we got home and unwrapped it that is Doh!

911 still not here though due any day the retailer says???

Between times I've bought two rc tanks for the grandchildren (and me) to play with. They are interactive in as much s each has four led's and when one of the other tanks scores hit it knocks the led out...4 out and game over.....I'm just waiting for them to arrive, now why does that sound familiar heehaahaa :-)

The snow is at last receding so hopefully come the weekend we'll all be out in the garden with the two tanks and both heli's Watch this space, but don't hold your breath!

All the best,
Mike.
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Old Jan 23, 2013, 01:58 PM
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United States, WA, Port Orchard
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9118 lower blade shaft fixing

Hi Mike,

Upon looking closer at some of my three channel heli's I see that they do have two buckles, (I actually got up and went over and took them down off of the shelf) both are tight without any noticable play. My Syma s33's and s033G both have 2 buckles, While my DH9118's only have one. One of my 4ch coaxial heli's only has one buckle, but my single blade 4ch heli's have two.

The main thing is whether it's one buckle or two, that they be a good fit and no noticable slop. The balance bar should move up and down freely, But without any slop. The side to side movement should also be free, But without any slop. I can tell you first hand how a 3ch coaxial heli' flies without a balance bar as I had the pin come out of the balance bar while flying one of the DH9118's.

That's a bummer about your V911 still being on the delivery trail "somewhere".

I've always wanted a RC Tank, But the one's that I want, seem to cost a arm and a leg. To be truthful, If it's a RC anything, I want it.

Have fun with the Tanks, when you get them. We are now back in a low pressure system, And it's Raining, So my Outdoor flying came to an end yesterday.

Hope you get the V911 Soon.

J
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Old Jan 27, 2013, 04:54 AM
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Hi Jim,
The tanks and the 911 are here at last!!

The new heli has been a bit of a trial but I'm getting there slowly. The biggest problem has been adapting to the tranny layout, having only the experience of the 9118 and a little 107 the new controls don't as yet seems instinctive.
Anyway I can get it to hover and move around reasonably well, it's just when there's a sudden drift because of air disturbance that I get a bit mixed up with left and right etc and end up crashing. But Is it fun...you bet! :-D
It's so quick and responsive and it can certainly take a hammering...no damage as yet which is amazing.
Initial setting up was pretty straight forward, spending a fair amount of time adjusting the servo links so that it did more or less what it supposed to in neutral stick positions. It could still do with a tiny amount of tweaking here and there but feel I should master flying the little chap first before polishing the detail.

The tanks are pretty neat, the only rub being them shedding a track if you make a sharp turn on carpet by operating only one track. I've yet to test it, but I think this maybe cured by by making one track reverse while the other goes forward, seems obvious now I write but I'll let you know if it works.

Regarding 1 or 2 buckles, I figure if there's any slack two will minimise this as opposed to one,
but maybe it's worth experimenting to see if there's any measurable affect or advantage.

Well the snow has finally gone and the sky is blue; sadly the wind is howling so can't try either heli outdoors arrgh!!!

By the way, we did tour a few years back starting in Seattle and driving down as far as Phoenix. Went up Mount St Helens within a 1/4 mile of the summit remains and viewed the incredible devastation!! I just remembered...it was in fact 9/11 when we were in Seattle on the very day of the towers going down. I remember the whole trip as being a bit strange because of the national shock, when got to LV the casino's were near empty apart form the odd tourist such as ourselves.
Anyway the point is we have fond memories of Washington State, and you're very lucky to live in such a beautiful place, yes indeed. ;-)

Regards,
Mike.
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